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KX-TG9471B/KX-TG9472B/KX-TGA939T
9.1.1.
Check Power
9.1.1.1.
Base Unit
Is the AC Adaptor inserted into AC outlet? (*1)
Cross Reference:
Power Supply Circuit
(P.9)
Note:
(*1) Refer to
Specifications
(P.6) for part number and
supply voltage of AC adaptor.
9.1.1.2.
Portable
Cross Reference:
Power Supply Circuit/Reset Circuit
(P.12)
Is the input voltage of IC341: 5 about
5.5 V - 11 V?
Check C301, C302, C303, C311 are not shorted.
Check AC Adaptor.
Check
Power Supply Circuit
.
Is the output voltage of IC341: 2 about 4 V?
Is the output voltage of IC331: 2 about 3.3 V?
Does BBIC (IC501: 21) oscillate at 10.368 MHz?
Check X501, C512, C511, R511.
Check BBIC (IC501) and FLASH MEMORY 2
(IC561).
Is the Collector of Q381 about 3 V?
Is the Collector of Q386 about 1.8 V?
Is BBIC (IC501: 120) High?
Check BBIC (IC501), Q541.
YES
OK
YES
YES
YES
YES
YES
YES
YES
YES
NO
NO
NO
NO
NO
Is the output voltage of IC321: 2 about 2.5V?
NO
NO
NO
Check
Power Supply Circuit/Reset Circuit
.
Check X1.
Check the battery.
Is the voltage of J1 over 2.3 V?
Check the battery and around J1 (BATT+)
and J2 (BATT-) are not shorted.
Is the battery inserted to J1 (BATT+) and J2 (BATT-)?
Check BBIC (IC1).
Does BBIC (IC1: 10) oscillate at 10.368 MHz?
YES
YES
NO
NO
NO
NO
Is the voltage of +1.8 about 1.8 V?
YES
OK
Is the voltage of CP2.5 about 2.5 V?
YES
Check BBIC (IC1).
YES